Clubhouse Signature

A clubhouse signature is one that was signed by a team's clubhouse attendant (also called a "clubhouse boy") rather than the actual athlete. This practice was particularly common in baseball from the 1940s through the 1970s.

Clubhouse attendants would sign baseballs, photos, and other items in bulk, often at the direction of the team. These signatures were distributed to fans, charities, and organizations as if they were authentic player autographs.

Identifying clubhouse signatures requires expertise. They typically look slightly different from the player's genuine signature — perhaps more careful, more consistent, or lacking the natural flow of the real signature. Authentication companies maintain records of known clubhouse patterns.

Clubhouse signatures are considered non-authentic and have no significant collector value. Major authentication companies like PSA and JSA will reject clubhouse signatures during the authentication process.

The most commonly faked players through clubhouse signatures include Mickey Mantle, Roger Maris, and other popular players from the 1950s and 1960s. If purchasing vintage autographs from this era, authentication from PSA or JSA is essential.

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